Osmotic pump comprising a pressure device for pressurizing the solvent
First Claim
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1. An osmotic pump, comprising:
- a first chamber (8) comprising an osmotically active substance (18);
a second chamber (15) for a solvent (17);
a semi-permeable barrier (14) separating the first chamber (8) from the second chamber (15), the semi-permeable barrier (14) being impermeable to the osmotically active substance (18) and permeable to the solvent; and
a position-independent pressure device (60);
characterized in that the second chamber (15) is arranged to be filled with the solvent (17), and that the position-independent pressure device (60) is in fluid communication with the second chamber (15) and arranged for pressurizing the solvent (17) in the second chamber (15).
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Abstract
An osmotic pump comprises a first chamber (8) comprising an osmotically active substance (18), a second chamber (15) arranged to be filled with a solvent (17), and a semi-permeable barrier (14) separating the first chamber (8) from the second chamber (15). The semi-permeable barrier (14) is impermeable to the osmotic active substance and permeable to the solvent (17). The osmotic pump further comprises a pressure device (60) in fluid communication with the second chamber (15), wherein the pressure device (60) is arranged for pressurizing the solvent in the second chamber.
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Citations
17 Claims
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1. An osmotic pump, comprising:
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a first chamber (8) comprising an osmotically active substance (18); a second chamber (15) for a solvent (17); a semi-permeable barrier (14) separating the first chamber (8) from the second chamber (15), the semi-permeable barrier (14) being impermeable to the osmotically active substance (18) and permeable to the solvent; and a position-independent pressure device (60); characterized in that the second chamber (15) is arranged to be filled with the solvent (17), and that the position-independent pressure device (60) is in fluid communication with the second chamber (15) and arranged for pressurizing the solvent (17) in the second chamber (15). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An osmotic pump, comprising:
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a first chamber (8) comprising an osmotically active substance (18); a second chamber (15) arranged to be filled with a solvent (17); a semi-permeable barrier (14) separating the first chamber (8) from the second chamber (15), the semi-permeable barrier (14) being impermeable to the osmotically active substance (18) and permeable to the solvent; and
a position-independent pressure device (60) in fluid communication with the second chamber (15), the pressure device (60) being arranged for pressurizing the solvent (17) in the second chamber (15);wherein a valve (23, 29) comprises at least a first and a second port, the first port being in fluid communication with the pressure device (60) and the second port being in fluid communication with the second chamber (15).
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13. An osmotic pump, comprising:
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a first chamber (8) comprising an osmotically active substance (18); a second chamber (15) arranged to be filled with a solvent (17); a semi-permeable barrier (14) separating the first chamber (8) from the second chamber (15), the semi-permeable barrier (14) being impermeable to the osmotically active substance (18) and permeable to the solvent; and a position-independent pressure device (60) in fluid communication with the second chamber (15), the pressure device (60) being arranged for pressurizing the solvent (17) in the second chamber (15); and a valve (61, 46) comprising at least a first and a second port, the first port being in fluid communication with the first chamber (8) and the second port being in fluid communication with the second chamber (15), wherein the valve being arranged to provide a direct fluid communication between the first chamber (8) and the second chamber (15).
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14. A method for controlling the flow of a solvent in an osmotic pump comprising a first chamber (8) which comprises an osmotically active substance (18), a second chamber (15) which comprises the solvent, and a semi-permeable barrier (14) separating the first chamber (8) from the second chamber (15), the semi-permeable barrier (14) being impermeable to the osmotically active substance (18) and permeable to the solvent, wherein the solvent is imbibed through the semi-permeable barrier (14) by osmosis, comprising the step of substantially permanently pressurizing the solvent in the second chamber (15);
characterized in that the second chamber is arranged to be filled with the solvent (17) and that a position-independent pressure device (60) is in fluid communication with the second chamber (15). - View Dependent Claims (15, 16)
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17. A fluidic system, comprising:
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an osmotic pump, comprising a first chamber (8) comprising an osmotically active substance (18), a second chamber (15) arranged to be filled with a solvent (17), a semi-permeable barrier (14) separating the first chamber (8) from the second chamber (15), the semi-permeable barrier (14) being impermeable to the osmotically active substance (18) and permeable to the solvent, and a position-independent pressure device (60) being arranged for pressurizing the solvent (17) in the second chamber (15); and a fluidic device connected to the osmotic pump, the fluidic device requiring a minimum pressure for pumping a fluid through the fluidic device, wherein the pressure device of the osmotic pump is arranged to provide a pressure which is at least equal to or higher than the minimum pressure of the fluidic device.
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Specification